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Marathon Ashland Petroleum (3165), Garyville

LDEQ Accident Report

Accident #121645
PDF AvailablePDF
State Police #10-00961
Accident Date2010-02-22
Report Date 2010-02-24
Follow-up Date 0000-00-00
Follow-up: No

Pollutants Released

Pollutant Duration Point Source Greenhouse Gas Criteria Pollutant Ozone forming chemical Amount of Release
Sulfur Dioxide18mFLARE: coke drum overhead line; 205-PC-1511-V2; north flareNOYESNO2,548.0 pounds
Nitric Oxide18mFLARE: coke drum overhead line; 205-PC-1511-V2; north flareNOYESNO15.0 pounds
Highly Reactive Volatile Organic Compounds (HRVOCs)18mFLARE: coke drum overhead line; 205-PC-1511-V2; north flareNONONO21.5 pounds
Volatile Organic Compounds (VOCs)18mFLARE: coke drum overhead line; 205-PC-1511-V2; north flareNONOYES31.7 pounds
Hydrogen Sulfide18mFLARE: coke drum overhead line; 205-PC-1511-V2; north flareNONONO6.8 pounds
Ethane18mFLARE: coke drum overhead line; 205-PC-1511-V2; north flareNONOYESBRQ
Methane18mFLARE: coke drum overhead line; 205-PC-1511-V2; north flareYESNOYESBRQ

Accident Classified As:

Cause of Problem: Under Investigation

Water from the offline coke drum overhead line was inadvertently sent to the Main Fractionator, vaporized and overpressured the wet gas compressor suction drum causing 205-PC-1511-V2 to open to the North Ground Flare. Released into air. FLARE.

Discharge Preventable - Under Investigation

All aspects of incident are currently under investigation. Tap Root analysis is ongoing.

Notes/Remedial Actions

RQ. 2548 lbs of Sulfur Dioxide, 15 lbs of Nitrogen Oxides, 6.8 lbs of Hydrogen Sulfide, 21.5 lbs of Highly Reactive Volatile Organic Compounds (HRVOCs), and 31.7 Volatile Organic Compounds (VOCs). LDEQ report states that "this incident is an area of concern with regards to LAC 33:III.905." Remedial Actions: Cut charge on 205 Coker due to Fractionator pressuring problem and removed ROSE Pitch from unit. Put ROSE unit on internal circulation. Relieved to flare.